As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OPERATOR REPORTED ENGINE LOW POWER. ON INVESTIGATION FOR LOW POWER, THE NR 1 NOZZLE SHIELD WAS FOUND WITH THE DOME COMPLETLY SEPARATED FROM SHIELD INNER RING/BAND. THIS FAILURE RESULTED IN DAMAGE TO NR 1 TURBINE NOZZLE WHICH MAY HAVE TO BE SCRAPPED. THIS FAILURE WAS PRIMARY CAUSE OF REPORTED LOW POWER.